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swung0x48 aba329cc53 [Docs] (Disaggregated): P6's plan and contract draft; the working notes move from a local directory into the repository

Two things land together: the plan and contract draft P6 needs before it starts, and the
working notes that until now existed on exactly one machine.

1. P6's plan and contract draft (neither started; not one line of code)

docs/Disaggregated/P6-SPAWN-PLAN.md the package plan
docs/Disaggregated/P6-CONTRACT-DRAFT.md the contract draft (moves to
MG_Remote/CONTRACT-P6.md when c6 lands)

The three findings that mattered, all written into the documents:

a. P6 is SMALLER than its roadmap cell suggests. The transport primitives are already in
the tree and already tested: SocketDoorbell including hangup detection and the two
lost-wakeup fences (Doorbell.cpp:211-360, four cases in FdPassingTest), SCM_RIGHTS fd
passing, ShmSegment::Adopt, and the SurfaceOp / WindowKind schema already defined in
protocol.fbs. inproc uses a real second shm mapping rather than an alias, and
SessionRings.h:22-28 says that was done so today is not the first time it runs. P6 is
assembly plus a control plane plus a process, not "write a socket transport".

b. The evidence for "P6 is only a transport swap" has EXPIRED. It was bought by P5c, whose
audit found 59 direct memory accesses in a tree that already looked clean. P5e changed
the tree again. So the first package, a6, is a read-only audit that writes no code, and
every contract row that depends on it is marked PENDING a6 rather than decided in
advance.

c. P6 does not get a game running on the phone. ANativeWindow* is meaningless in the child,
and protocol.fbs:186-196's own comment says Android transfers the window out of band -
that band is P12. P6 lands pbuffer / surfaceless / offscreen, which is what HeadlessGL,
the split-equivalent lane and trace replay need, and which is exactly what P6's own exit
gate measures. A real window reaching the server is a named refusal. This gets its own
section because "P6 is done" would otherwise read as "the game runs now".

The contract adds rule G: a role may not name a process-local handle. It extends P5c's
rule E (a role may not name the other role's memory) from memory to identity - EGLDisplay /
EGLSurface / EGLContext / ANativeWindow* / fd number / pid / mapped address either cross as
a token this contract defines or they do not cross, and a descriptor crosses only through
SCM_RIGHTS, where the kernel renumbers it.

What P5e left for P6 gets its own section. The latch semantics are already designed
(ARCHITECTURE.md:504) and are copied unchanged. What is new is that after run-ahead the
client no longer waits while the peer process can DIE: the client holds records that were
published and will never be applied, and Android's freezer suspends the child without
closing anything. So slow and dead must be distinguishable WITHOUT a timeout threshold.
That is P6's only new design; everything else is carriage. It shares a predicate with E1's
outstanding re-specification (ID-122), and the two should be designed together.

Two gates carried over from P5e's lessons: G2 requires integration-spawn's test-name set to
match integration-split's name for name, because a differing set means the lane is quietly
running less; and the arm-proof gate requires every entry to record the child pid and
transport=spawn in its OWN private log - ID-124 established that this kind of false green
really happens, and a spawn lane that actually ran monolith would pass every other gate.
S2's shape must be settled before it is written, and the document says why: E1 is the
cautionary case.

2. The working notes move into the repository (docs/Disaggregated/notes/, 415 .md files)

ROADMAP / CURRENT_STAGE_PROGRESS / MEASUREMENTS cite ruling numbers, audit line numbers and
the provenance of gate figures from ~/w7/notes/, a directory that exists on one machine and
is under no version control. A record cited hundreds of times that lives only locally is not
a record, so it moves in whole, with its directory structure intact.

Only .md moves. Scripts, run logs, census and gate result JSON, patches, APKs and nm dumps
stay where they are: they are evidence DATA rather than documents - large, regenerated per
run, and mostly carrying absolute paths and device serials that mean something only on the
machine that produced them. The mapping and this split are written in
docs/Disaggregated/notes/README.md.

Two exceptions are recorded there too: P6's BRIEF has been promoted to a first-class
document and keeps no copy under notes/, so the two cannot drift apart; and recovered/ holds
material salvaged from failed workflow runs, which may duplicate the like-named phase
directories and is kept because a few of those were the only complete version at the time.

CI's citation lint takes docs/Disaggregated/*.md only (non-recursive), and notes/ is
deliberately outside it: those notes' file:line citations were written against their own
code heads, and resolving them against today's HEAD would fail wholesale - which is not an
error, it is their correct state as a historical record. To check one, use the revision it
declares (--rev).

3. Inconsistencies fixed in passing

- README.md's status line still said P5e was in progress while the stage table already said
closed.
- CURRENT_STAGE_PROGRESS's next-step item 1 still listed the exit gate as pending, though
(a) and (b) were run in the previous commit; rewritten to closed plus the one item that
actually remains (E1).
- ROADMAP's P6 row still had the pre-phase plan in three of its cells; it now carries the
package order, the scope boundary and the two new gates.

Checked with check_doc_citations.py: 125 citations across docs/Disaggregated/*.md, 0 problems.

2026-09-18 23:31:39 -04:00

6.9 KiB

Raw Blame History

P4a device A/B - per-thread CPU per frame (ms), best-of-3 repeat, trailing window

device	case	backend	finish	pull p50	P3a boundary (0x1ff) p50	P4a (0x1fff) p50	d P3a-boundary	d P4a total	pull p99	P4a p99	pins pull/1ff/P4a	mpr 1ff/P4a
35d0befa	improved-transparency-minecraft-26.3	DirectGLES	on	10.797	-	12.363	-	+14.5%	25.557	27.004	P/P / - / P/P	- / 8
35d0befa	improved-transparency-minecraft-26.3	DirectGLES	off	10.759	11.857	12.431	+10.2%	+15.5%	25.406	27.013	P/P / P/P / P/P	8 / 8
35d0befa	improved-transparency-minecraft-26.3	DirectVulkan	on	10.729	-	11.591	-	+8.0%	24.924	25.976	P/P / - / P/P	- / 0
35d0befa	improved-transparency-minecraft-26.3	DirectVulkan	off	10.671	11.526	11.583	+8.0%	+8.5%	25.034	26.117	P/P / P/P / P/P	0 / 0
35d0befa	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	on	1.702	-	1.346	-	-20.9%	315.989	316.342	P/P / - / P/P	- / 2
35d0befa	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	off	1.304	1.861	1.946	+42.7%	+49.2%	317.280	317.310	P/P / P/P / P/P	2 / 2
35d0befa	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	on	0.722	-	0.817	-	+13.2%	459.039	447.908	P/P / - / P/P	- / 0
35d0befa	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	off	0.763	0.784	0.794	+2.8%	+4.1%	453.873	451.470	P/P / P/P / P/P	0 / 0
35d0befa	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	on	1.285	-	1.446	-	+12.5%	2.436	2.715	P/P / - / P/P	- / 1
35d0befa	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	off	1.380	1.398	1.440	+1.3%	+4.3%	2.455	2.493	P/P / P/P / P/P	1 / 1
35d0befa	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	on	0.961	-	1.037	-	+7.9%	2.086	2.097	P/P / - / P/P	- / 0
35d0befa	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	off	0.944	1.010	0.522	+7.0%	-44.7%	1.992	1.337	P/P / P/P / P/P	0 / 0
35d0befa	minecraft-1.21.4-in-world	DirectGLES	on	2.362	-	2.853	-	+20.8%	5.184	5.683	P/P / - / P/P	- / 0
35d0befa	minecraft-1.21.4-in-world	DirectGLES	off	2.341	2.724	2.841	+16.4%	+21.4%	5.183	5.633	P/P / P/P / P/P	0 / 0
35d0befa	minecraft-1.21.4-in-world	DirectVulkan	on	1.966	-	1.802	-	-8.3%	4.256	4.369	P/P / - / P/P	- / 0
35d0befa	minecraft-1.21.4-in-world	DirectVulkan	off	1.050	1.154	1.735	+9.9%	+65.2%	2.363	5.902	P/P / P/P / P/P	0 / 0
35d0befa	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	on	8.221	-	11.253	-	+36.9%	23.081	24.987	P/P / - / P/P	- / 0
35d0befa	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	off	8.236	10.840	11.204	+31.6%	+36.0%	21.918	24.882	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	improved-transparency-minecraft-26.3	DirectGLES	on	9.733	-	11.230	-	+15.4%	26.133	28.727	P/P / - / P/P	- / 8
3B159D009VZ00000	improved-transparency-minecraft-26.3	DirectGLES	off	9.819	10.660	11.224	+8.6%	+14.3%	26.154	26.980	P/P / P/P / P/P	8 / 8
3B159D009VZ00000	improved-transparency-minecraft-26.3	DirectVulkan	on	8.165	-	9.267	-	+13.5%	22.985	23.979	P/P / - / P/P	- / 0
3B159D009VZ00000	improved-transparency-minecraft-26.3	DirectVulkan	off	8.267	9.236	9.189	+11.7%	+11.2%	22.852	23.921	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	on	2.205	-	2.550	-	+15.6%	233.721	230.771	P/P / - / P/P	- / 2
3B159D009VZ00000	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectGLES	off	2.215	2.407	2.502	+8.7%	+13.0%	230.013	230.830	P/P / P/P / P/P	2 / 2
3B159D009VZ00000	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	on	0.641	-	0.649	-	+1.2%	262.991	266.935	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-fabric-iris-bsl-in-world	DirectVulkan	off	0.644	0.697	0.707	+8.2%	+9.8%	263.017	263.919	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	on	1.724	-	1.951	-	+13.2%	3.170	3.177	P/P / - / P/P	- / 1
3B159D009VZ00000	minecraft-1.21.4-fabric-sodium-in-world	DirectGLES	off	1.697	1.835	1.917	+8.1%	+13.0%	2.927	3.116	P/P / P/P / P/P	1 / 1
3B159D009VZ00000	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	on	0.417	-	0.446	-	+7.0%	1.126	1.152	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-fabric-sodium-in-world	DirectVulkan	off	0.430	0.474	0.447	+10.2%	+4.0%	1.221	1.135	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-in-world	DirectGLES	on	2.957	-	3.579	-	+21.0%	4.878	5.638	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-in-world	DirectGLES	off	2.892	3.365	3.521	+16.4%	+21.7%	4.925	5.772	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-in-world	DirectVulkan	on	0.898	-	1.035	-	+15.3%	2.065	2.234	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-in-world	DirectVulkan	off	0.893	1.029	1.040	+15.2%	+16.5%	2.050	2.215	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	on	9.863	-	15.390	-	+56.0%	27.202	29.596	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-rd12-odinlite-in-world	DirectGLES	off	10.027	13.003	12.967	+29.7%	+29.3%	27.715	28.130	P/P / P/P / P/P	0 / 0
3B159D009VZ00000	minecraft-1.21.4-rd12-odinlite-in-world	DirectVulkan	on	7.681	-	10.662	-	+38.8%	23.912	28.533	P/P / - / P/P	- / 0
3B159D009VZ00000	minecraft-1.21.4-rd12-odinlite-in-world	DirectVulkan	off	7.891	9.959	10.415	+26.2%	+32.0%	25.083	28.348	P/P / P/P / P/P	0 / 0
3B159D009VZ00000-old	improved-transparency-minecraft-26.3	DirectGLES	on	9.857	-	11.404	-	+15.7%	26.125	27.013	P/P / - / P/P	- / 8
3B159D009VZ00000-old	improved-transparency-minecraft-26.3	DirectGLES	off	9.601	-	11.487	-	+19.6%	26.230	27.477	P/P / - / P/P	- / None
3B159D009VZ00000-old	improved-transparency-minecraft-26.3	DirectVulkan	on	-	-	-	-	-	-	-	P/? / - / -	- / -
3B159D009VZ00000-old	improved-transparency-minecraft-26.3	DirectVulkan	off	8.197	-	-	-	-	23.349	-	P/P / - / -	- / -

d P3a-boundary = push(0x1ff) vs pull; d P4a total = push(0x1fff) vs pull; the P4a-only share is the difference of the two. A '-' p50 means the run produced no result (rc != 0); see the runner.log in that directory.

6.9 KiB Raw Blame History

P4a device A/B - per-thread CPU per frame (ms), best-of-3 repeat, trailing window

6.9 KiB

Raw Blame History